Grinding-machine.



P. MLLER.

GRINDING MACHINE.

APPLICATION FILED MAB..15, 1907. RENEWBD MAY 13, 1911.

P INVENTOR www www WITNESSES:

ATTORNEY F. MLLER.

GRINDING MACHINE.

AIPLIOATION FILED MAR. 15, 1907. RENEWED MAY 13, 1911.

Patented Mar. 4, 191.3.

3 SHEETS-SHEET 2.

F. MLLER.

GRINDING MACHINE.

APPLICATION FILED MAB.15, 1907. RBNEWED MAY 13,1911.

1,055,286. Patented Mar. 4, 1913.

/weor *omnia fsTATns rurrianr OFFICE.

'FRIEDERICH MLLER, OF LIZABETH, NEW JERSEY.

i GRINDING-MACHINE.

' Specification of Letters-Patent.

nmssnnn Patented Mar. 4, 1913.

Application led March 15, 1907, Serial No. 362,574. Renewed May 18, 1911. Serial No. 627,078.

To all lwhom, 'it may concern: v l 'Be' it knownI that I, FRIEDERICH lS-ILLEn, a citizen of the mted States, and a resident-of Elizabeth. county of Union, and,

State of New Jersey, have invented certain lnew anduseful Improvements in Grinding automatically ground to a dimension within very exact limits, although in other of its features theinvention may be applicable to grinding `machines generally.

' i Objects of the invention are to provide a.

' machine which will automatically grind the work to dimension within very exactlimits without requiring constant care and attention from a skilled attendant.; to provide a ma' chine which will automatically separate the work and the wheel when the work has been ground to dimension.; to provide a machine which, in addition to 'the grinding action proper, will 'automatically give an addtional finishing or polishing action; to p rovide a machine which will give a variety of lsa relative movements between the wheel and work and which providesfor various combinations and variations of such movements for different purposes and kinds of work;"

vvide for 'accurate and exact adjustment andvariation of such movements; to provide for accurate. grinding of they work and to piovide yfor the elimination of inaccuracy, due tospring oi" play that may occur iii/"the parts of the machine; to provide a machine embodying these features, together Awith others, which shall require a minimum of attention from the attendant. These and other objects of invention will in part. be obvious and .will in part more fully appear hereinafter.

The invention consists in the novel parts, arrangements, improvements and combinations herein shown and described.

The accompanying drawings, referred to herein' and forming a part hereof, illust-rate one embodiment of the invention. the same `serving in connection `with .the description herein to explain the principles of the invention.

Of the drawings: Figure 1 is a plan view, lwith parts removed, ofl a machine constructed in part in accordance with the principles of the invention Figs. 2 and 3 are details showing parts of the mechanismy for controlling the wheel supporting carriage in different positions; Fig. 4 is an elevation, partly in section, on, the line A-B of Fig. l; Fig.-5 is a sectional elevation on the line C-D of Fig. 4; Fig. 6 is a fragmentar secdra'wings, means are shown for supporting the work and means for supporting a grindmg wheel, and also means for causing :a

relativel a proaching movement between the.

wheelan thework. According to certain features of the invention this movement may be A`for the purpose of bringing the wheel -and the work into operative relation, or it may for 'the purpose of keeping them in operative relation yas the work .is ground away bythe wheel, or it. may be for a com- 7o ment of the invention in the accompanying sofy bination of t-hese purposes.A According to certain features of the invention, however, and as shown in the illustrated embodiment, the approaching movement comprises what may be -termed 'two relative movementsfone of the movements being `a positioning movement`to bring the work and the wheel into operative relation with each other after the work has been inserted in its support 'and the other movement to keep them in .operative relation as the work is ground away by certain features of the invention, however,

and as shown in the illustrated embodiment, the wheel moves toward and from the work in performing the said movement. In the said illustrated embodiment means for` effecting the functions indicated. together with other functions, are provided, the illustrated form of said means includilig a grinding wheel l mounted for rotation in any sultable orconvenient manner, as upon a shaft 2 carried in bushings 3 upon a sups port l. Any suitable means for rotating Ithegrinding Vwheel may be provided. j The 4the work. In the forml of means shown herein the said carriage is slidable upon suitable guides shown as being carried upon the machine frame.

The invention comprises, according to certain of its features, means for limiting the I. approaching relative movement of the ,work

and-,the wheel andalso comprises automatic means for causing Ia relative separatingA movement between the work and the Wheel and further comprises, according to certain aspects of the invention, means'for causing said separating means to operate at' a definite period after the approaching movement has ceased or has been limited. Means for effecting these functions have accordingly been incorporated in the present embodiment. The forms of .suchmean's included herein comprise an auxiliary carriage 6 having movement in av direction transverse to that of the carriage 5. `The saidqsupports are so constructed and arranged that as lthe carriage 6-is moved transversely inv one direction or the other that a suitable movement is imparted to the carriage 5.and to the grinding Wheel 1 supported thereon. The said carriages Aare constructed and arranged so that one receives movement from the other. As illustrated, a lug 7l is connected rigidly to the carriage 5 and'has sliding contact with a cam piece 8 upon the carriage 6. The face of the member 8 iii contact with the lug Tis so shaped that for a given motion of the carriage 6 a desiredinotion will bev imparted to the carriage 5. .Y

For the vpurpose of varying the relative position and movement of the two carriages the member 8 is shown as being pivotally mounted and as'having suitable" adjusting means eo-acting therewith. The form of said adjusting means herein shown. comprises a screw 9 threaded into a block 10 lthe member 8 willbe variedvvrelatively to the carriage 6 uponv which the member 8 is carried. Carried also upon the carriage 5 is a secondengagmg device, shown herein as an anti-frictionv roll 112l A 'second cam pieeelQ is shoivn fixed upon the carriage 6. The anti-friction roll 11 yand thecain piece l2 are adapted to contact with each other .at eertaintiines in order to`also control the movement of the 4carriage 5 with respect to the carriage 6 as will hereinafter be more fully set forth.

forth.

wing the approaching movement.

adjustable stop comprises a member 19 The caiiiage'G is provided with a suitable member forengaging. suitable actuatinove and control tlie vcarriage 6 and thereby the carriage 5 -and the grinding Wheel 1.

'As herein sho-wn said engaging member comprises an anti-friction roll 13, which is sliownin engagement with a cam member 14. Said cam member 14, in the present embodiment, is mountedvforr rotation upon a shaft 15. Upon the said cam member 14 are shown certain cam surfaces which for convenience may be designated as 16, 17v and 18, suitably shaped to. impart cert-ain moveinents to the carriage 6, and the operation of which will be hereinafter more fully set The cam member 14 is herein shown as Ibeing adjustable upon the shaft 15, thus serving to adjust and regulate the position and movement of the carriage 6. The illus- `trated form of such adjustment comprises a screw threadv upon the shaft 15 upon which the vmember 14 is threaded and suitable holding devices of any convenient form for holding the' cam 14 and shaft 15 in their movement and position of the Wheel 1, there is contemplated by certain features of the invention the providing of an adjustable stop upon the carriage 5 for positively limit- The said threaded in a lug 20 fixed relatively to the carriage 5, one face of the member 19 being adapted t'ocoiitact with a suitable face 21 carried upon the frame of the machine. ThisI additional limiting means serves to assist' in positively limiting the approaching movement of the Wheel in case thev saine should `be rendered more or less varied by any spring or play in the connected parts between the Wheel and the' devices for controlliiig its movement. Suitable means may j'also be4 provided for giving an Fadjustment ing means, said actuating means serving to v of the support 4 for the grinding wheel l la lug 24 upon the support 4. Suitable means .for giving a nicely 'controlled rotation to the screw 2Q is provided, such means be- 'with icespectto its carriage 5 and accord-v ing to certain features of the invention such s ying indicated generally by thereference numera'l 25.

'According ,to certain features of the ,inventlon, a relative advanclng movement between the `Wheeland the work 1s cont'em -plated and means 4for effecting such Inovement are included in the present embod1- ment.

The said. relativel advancing move- 'ment isa. movement in'the directionofthe the work. In the present Yembodiment the J said advancing movement is rotary. .al-

though yso far as concernsy many aspects of the Invention it might be a rectilinear orV other movement. In the illustrated 4form of means the --said relative movement is obtained by the movement f-the'work, suitable means being yprovided for rotatin the work before the grinding wheel. The illustrated form of said means comprises a head stock'26 and tail stock27, provided with suitable centers and holding devices and being mounted upon a bed 28. Suitable driv- `ing devices are shown in connectionwith the head block. The said devices may be of any suitable or convenient f orm and'as i11ustrated comprise a fast and loose pulley `29 and a belt shifter 30.

A relative traversing movement between the wheel and the work is contemplated by slidable longitudinally upon `the frame of,

the machine (see particularly Figs. 4 and. 8 of the drawings). Located adjacent to the said bed is shown al cam member 31- shown herein as ofrotary form andl as being mounted upon a suitable shaft 32. The said member 31 is further shown ashaving'in its periphery a cam groove 33 which co-acts with a suitable part, such as the anti-friction roll 34, carried by the bed 28.' ,Itl will Ybe seen therefore that the bed 28 may have a toand fro longitudinal movement iny the present embodiment as the work is rotated4 in contact with the rotating grlnding wheel.

The said traversing or vibrating movement may serve to feed different portions of thework into position to bevop'erated upon by 'th'e grinding wheel where the surface of the work to be ,operated upon is of greater extent transversely than ythe width of the grinding wheel. Where the surface of the wheel is in operative relation with the entire extent of the surface of the work trans- 'bratory movement.

versely, a movement of this kind is usefulV in causing a, more uniform action ofthe grinding wheel and thus obviating the effects of any slight imperfections in the grinding surface 4of the wheel and conduces also to an even wearingof the wheel.

In the last mentioned condition and, preferablyv in the firstmentioned condition the extent `or amplitude of the .vibrating movement is such that ythe grinding wheel remains in contact with thefwork during the ent-ire grinding operation, which is 4conducive to accuracy and uniformity of retent of vibrating movement is predetermined by the shape of the cam 'groove 33 and is not dependent upon the length of the ,surface tobe ground, which, as indicatedl bythe distance between the head and tail stocks 9.6 and 27, shown in Fig. 1, may b'e muchgreater thanthe amplitude of the vi- The' length of surface ground, when greater than the width of the wheel, isv determined by that width in addi tion 'to the extent of the-vibiation. It will be understood that the extent. of movement may be varie as also its rate by suitable changes, as for instance, in the form ofthe actuating cam, or in the gear connections b v which the shaft is driven, or both. It will be understood that changes in the traversing movement and in the approaching move'- ment may be combinedA in various ways to secure different effects, such changes `being eli'ected by suitable means, as for instance in the ways l1eretofore indicated. For example, 4an approaching movement. could take place during vanfentlre traversing movement ,and then cease during anotherentire traversing movement and these steps could be .repeatedva number of t1mes,'1f desired. or

the steps could be varied. or the movements ojllierwlse combined as might be found suita e.

Suitable driving means and controlling means are provided and the form thereof shown`r in' the drawings comprises a belt. pulley 35 connected by a mitergearing 36 to a shaft 3T. yUpon the said shaft is a worm38 in mesh with a worm wheel 39 upon the' shaft 32. Gear l0 upon the shaft 32 meshes with a. suitable intermediate 41 which in turn meshes with a gear 4-2 upon the shaft .15. In the present yembodimentone end of the shaft 3T is journaled in a sleeve 3 adapted to rotate upon'its support and" the other end in a bearing l-l pivotally mounted upon a lever l5 which is in turn pivotally mounted at 46 upon the machine frame. A suitable.pin-and-slot connection at? is provided for limiting the movement of the lever l5. Fixed upon a shaft 50 suitably mounted on the frame ofthe machine is a lever t8 which is vieldingly impelled in one direction by suitable means such as a salts. In the illustrated embodiment the exn spring 49. Fixed also upon the shaft v() is a hook 51 which is adapted to engage with a lug 52 upon the lever 45. An arm 53 fixed to the lever 48 is connected by a` pivfoted link'-t to a lever 55v having 'at its free end a friction roll 56 located in the path of the lug 57 upon the disk 58 carried upon the shaft 15. -The operation o-f the h erein-described machine is substantially as follows; The pulley 35 may be connected toa suitable driving d evlce. A piece of work is placed 1n posi-f tion in' the work suppe-rt and rotation 1m- Iparted thereto through Ithe driving pulleys 29 upon the head block. At this time the hook 5,1"is` out of engagement` with the lug 52 and the lever 45 is at its lowermost position carrying tlie-fworm 38 outf'of` engagement with its wheel; Theop'erator lifts the lever -45 andthe hook 51 yielding against the spring 49 snaps int-o position beneath the lug The worm 38 is then in mesh with the wheelt). The shafts 32 and 15 are thus.

' caused rto rotate. The rotation of the shaft 32 through the cam 33 imparts a transverse or vibratingl movement to the bed 28 and t0 the Work supported thereon. l

The carriage 5 and auxiliary carriage 6 may be regarded as being substantially in the position shown in Fig; 2. The lug 13v by the rotation of the member 14 rides along-'f the first steep .portion of its'cam, moving the carriage 6 quickly to the left, as seen-in Fig. 2` Thev lug 7 also rides up' the first steep incline 'upon the cam surface of the y member 8 thus giving the carriage 5, the

grinding wheel 1, and the connected parts a. relatively quick idle movement toward the work. The anti-friction roll 13 is n'ow iii contact with the gentle inclined cam surface 16 on the member 14`and. slowly but-posiv tively or unyieldingly 'moves the carriage 6 toward the. left, referring again ,to Fig. 2. During substantially all ythis time the lug 7 is in contact with lthe next inclined face of the cam piece S, (see Fig, which has usually' a very small degree of inclination and is slowly andl positively' moving or feeding the Wheel toward the work to 50- keep the wheel and the Work in operative relation as the work is ground away by` the wheel, the extent and speed of this movement being predetermined by the shape of the cam surfaces and the adjustment of the screw 9. Referring to Fig. 5 of-the drawings it will be noted that the cam surfaceA 16 extends into the cam surface 17 which is straight and therefore as 'the member 14 rotates allows the carriage 6 to remain stationary. There is therefore no advance movement of the carriage 5 and the grindi ing wheel 1-while the roll '1.3 is traveling along the 'surface 17. Substantially lat the time the roll V13 reaches the surface 17 the pin 19 enga-ges its stop 21 thus positively 'limiting the approachingmovement of the wheel 1y toward the work; v'The Wheel-1 conl.

tinuesto rotate howeven'as 4does, alsothe .1, work, and thus any. springl ori unevenness f inthe surface of the work is ground awayand `the finer andwliatj'may be termed alpolishing ,and dimensioning finish given tothe work. The' shaft 15 continuing its rotation, the roll 13 now comes in contact withv the cam piece 18' and the carriage 6 is then given aV relatively .quick movement in the opposite direction. At substantially the same time the roll 11 upon the carriage 5v comes in contact with the cam piece 12 upon `the auxiliary carriage` 6 and thecarriage 5 is moved backwardly carrying the grinding wheel with it from the work.' It will thus be seen that the separation of the wheel and work occurs at a definite period after the l' approaching movement has ceased or has been limited. At about this time the lug` .57 upon the disk 58 encounters the roll 56 on t-he lever 55. Lever 55 rocks backwardlyand thus rocks theshaft' 50 and causes the hook 51 to leave the lug` 52, whereupon the lever 45'drops downwardl and the .worm

38 passes out of mesh with its wheel 39."

The operator removes the work, inserts new work, and the machine 1s ready to pass int/o operatlon again.

From all the foregoing it will be understoodv that' al machine has been provided' which realizes thevobjects of invention and ,advantages herein set forth, together with other objects and advantages.

not limited to the particular constructions shown, nor to any particular `constructions by-which it has been or may be carried into effect, as many changes may be made in the mechanism ivithout" ,departing from the 4main principles of the inventlon and witha relative advancing movement between the. wheel and the work, automatic means forv causing a vibrating movement between the wheel `and the work and automatic means for separating Athe wheel and the work.

2. A grinding machine including in combination a grinding wheel, means for sup-l porting the work, automatic means for causing a relative approaching movement between the wheel and the work, automatic Ameans for causing a vibrating movement between the wheel and the work, and automatic -means for separating the wheel and the -work at a definite period after the approaching movement has ceased.

A1.00 The invention, 1n itsbroader aspects, 1sv 1 3. A grinding machine including in combination a grinding wheel, meansfor sup#I porting the work, automatic means for causing a relative approaching movement between the wheel and the work, n ieans for limiting such approaching movement,auto matic means for causing a vibrating movement between the wheel and the work, and automatic means for separating the wheel and the work, said separating means being constructed and arranged to operate at a definite period after the approaching movement has been limited. p

l. A grinding machine including iny conibinat-ion a grinding wheel, means for supporting the work, automatic means for causing a positive and predetermined relative approaching movement between the wheel and the work, automatic means for cansing a relative vibrat-ing movement between the wheel and the work, and automatic means for separating the wheel andthe work.

5. lA grinding machine including in coni.

bination a grinding wheel, means for supporting the work, automatic means for causing a relative approaching movement between the wheel and the work, automatic tween the wheel andthe work, means for limiting the approaching movement, automatic means forcausing a relative advancing movement between the wheel and the work, vautomatic means for causing a relative vibrating movementl between lthe wheel l and thework, and automatic meanscfor separating the wheel and the work, said separating means being constructed andl arranged to operate at a definite period after the approaching movement has been limited.

7. A grinding machine including in combination agrinding wheel, means for supporting `and rotating vthe work. vautomatic` means for causing a positive and'predetermined relative approaching movement between the wheel an'd the work, automatic means for causing arvibrating movement between the wheel and the work, and automatic means for separating the wheel and the work. V

8. A grinding machine including in combination a grinding wheel, means for supporting and rotating the work. automatic means for causing a relative approaching movement between the wheel andthe work,l

movement between the wheel and the-work,

and, automatic means for separating the l.

movement between thewheel and the work, means for limiting.; the approachlng movement, automatic means for causm a vibrating movement between the whee and the.

work, and automat-ic means for separating the wheel and the work.

10. A grinding machine including in coinbination a grinding wheel, means for supporting and lrotating the work, automat1c means for causing a relative approaching movement between'the wheel and the work, means for limiting the approaching movement. automatic means for causing a vibrating movement between the wheel and the,

work, and automatic means for separating` the wheel and the work, said separating automatic means for causing a vibrating means being'constructed and arranged to operate at a definite period after the ap proaching movement has been limited.

11. A grinding machine including in coinbination a support for a grinding wheel, aj

work support, one of said supports being'l mounted upon aslidable carria e, a movable cam member constructed an arranged to control the movement of the said carriage, said cani member being pivotally mounted, anda screw-threaded .lneniber for adjustably positioning the said pivoted cam memsecond carriage affects the movement of the first, and means foradjusting the connections between the said carriages so as `to var vthe movement of the first carriage for a given Vmovementof the second. s s i 13. A grinding machine including in coms bination a support for a grinding wheel, a work support, -one of said supports being mounted upon axslidablecarriage, a second carriage .slidable transversely to the path of the first calj'riage, a cam member upon one of thesaid carriages constructed 4and arranged to engage the other'carriage, and screw-threaded means for' adjusting the osition of said cam member so as to vary t e movement of one carriage relatively tothe other. y

ll. A grinding machine including in comits biiiatioii 'a support for a grinding Wheel, a work support, one of said supports being mounted upon a slidable carriage, a second carriage s'lidablelv transversely to the path of vthe first carriage, cain members between the two carriages for controlling the movement in both directions of the first carriage by the movement of the second carriage, and a rotary cam member 'forgiving the seconda definite length 'of stroke.

- 15.l A grinding machine including in combination agrindingwheel, means for 'supporting the work, mea-ns for causing a rela- ,tive approaching movement between the vwheel and the work, means for separating the wheel and the Work-,- driving means for 'said approaching'l means and searat-ing means, rand automatic means for t rowing off -the said driving means upon the.l completion' of said .approaching and separating movements. y

16. A grinding machine4 including in combination a grinding Wheel support, a Work Y support, automatic means for causing said relatively rapid idle movement and then lwith a relatively slow feeding movement,

means for limiting said approaching movef ment, means for causing a vibrating movenient between the Wheel and the work and 'automatic means for separating said su ports a definite period after said approac .ing `movement has been limited.

, .18. A grinding machine including in combinat-iona grinding wheel support, a Work support, automatic means for causing said supports to approach each other with ay relal tively rapid.v idle movement 'and then with a relativelyslow feeding movement, means .for varying the, amount of`said relatively slow movement: and means for adjustably limiting said approaching movement.

19. A grinding machine including in comi biiiation ay grinding wheel support, a4 Work support, automatic means forca sing said supports to approach each other with a relatively rapid movement and then with a rela` tively slow movement, means Ifor varying the amount of said relatively slow movebination' a grinding wheel, means for rotate5- inent, means for adjustably. limiting'said approaching movement, and means for se arating said supports a definite period after said approaching movement has been limited.

20. Aigrindin machine including in coining the grinding wheel, a slidable carriage machine including in clomupon which the grinding wlieel'is'mdilnt'ed,

means for adjusting the position lof the grinding wheel relatively to its carriage, *a second carriage slidable transversely to. the path of the said first carriage, connections between the said carriages whereby the movement of the second .carriage causes first a rapid and then a slow movement of the first carriage, means for driving said second carriage, means for support-ing the work, means for rotating the work, and means for giving the work a vibrating movement relatively to the wheel.

21. Agrinding machine including in combination a grinding wheel, means for rotating the lgrinding wheel, a slidable carriage for supporting the grinding Wheel, meansI for adjusting the position of the grinding wheel with respect to its carriage, a second carriage slidable in a path transverscli-v to that of the first carriage,conn'ec tions between the said carriages whereby the second carriage moves the first, adjustments for the said connections for varying the movement of the firstfor a given movement of the second, adjustable means for positively limiting the movement of the first carriage, a rotary cain member for driving the second carriage, means for supporting the work, means -for' rotating the work, and means for giving the work avibrat-iiig movement relatively to the grinding wheel. 1 22. A grinding machine including in coinbination, a grin-ding wheel, a work support, autoinatic'means for-causing a positive vand predetermined relative approaching movement between the wheel and the work, automatic means for causing a relativel advancing movement between the wheel and the work, automatic means for causing a vibrating movement between the wheel andthe work, and automatic means for causing a cessation of the.. grinding action on the work. v

23. A grinding machine including in coinbination, a grinding wheel support, a work support, means for effecting a predetermined relative approaching movement between said supports, and means for effecting a predetermined relative feeding movement between said supports.

' 24. A grinding machine including in combination, a grinding wheel support, a work support, means for effecting a predetermined relative feeding movement between said supports, and means'for separating said supports' at a predetermined priod after the feeding movement has ceased. n

25. A grinding machine including in com- Ibiiiation, a grinding wheel support, a work support, means for effecting a'predetermined relative approaching movement between said supports, means for effecting a lpredetermined relative feeding movement between `said supports, and means for separating said a relative vibrating movement between the wheel and the work, said vibrating movement being of such small amplitude that the grinding wheel remains in contact with the vwork during the grinding operation,V

QT. A grmdmg machlne including 1n combination, a grinding wheel, means for supporting and rotating the work, means for effecting a positive and predetermined relative approaching 'movement between the wheel and the work, and means for eecting a relative vibrating movement between the wheel and the work, said vibrating movement being of an amplitude predetermined 'independently of the dimensions of the work to be ground. l 28. A grinding machine including in com bination, a grinding wheel, means for supporting and rot-ating the work, automatic means for effecting a relative approaching' movement between the wheel and the work, means for positively limiting the approaching movement, and automatic means for effecting a vibrating movement between the wheel and the work, said vibrating movement being of an amplitude predetermined independently of the dimensions of the work to be round.

29. l grinding machine including in combination, a grinding wheel, means for supporting and'rotating the work, automatic means for effecting a relative approaching ymovement between the wheel and the work,

means for 'effecting a relative vibrating movement between the wheel and the work, said vibrating movement being of an amplit-ude predetermined independently of the dimensions of the work, and automaticl means for separating the wheel and the work ata definite period after the approaching movement has ceased.

In testimony whereof, I have signed my name lto this specification, in the presence of two subscribing witnesses.

FRIEDERICH MULLER. lVitnesses:

EDWIN SEGER, WM. J. DoLAN. 

